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/**
* Yudit Unicode Editor Source File
*
* GNU Copyright (C) 1997-2023 Gaspar Sinai <gaspar@yudit.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2,
* dated June 1991. See file COPYYING for details.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*!
* \file SRendClass.cpp
* \brief Convert Yudit Character Types to OTF.
* \author: Gaspar Sinai <gaspar@yudit.org>
* \version: 2000-04-23
*/
#include "stoolkit/SRendClass.h"
#include "stoolkit/SCluster.h"
/*
* \brief Get the inherent rendering class of the character.
*
* We use a somewhat different naming convention than
* specified in OpenType documents. Here is the Mapping:
*
* The types in square brackets are handlesd in a
* hard-coded switch in here.
*
* Cbase SD_INDIC_CONSONANT_BASE
* Cbellow SD_INDIC_CONSONANT_BELOW_BASE
* Cpost SD_INDIC_CONSONANT_POST_BASE
* Cdead SD_INDIC_CONSONANT_DEAD
* Mbelow[,VMbelow] SD_INDIC_BOTTOM_VOWEL
* Mabove SD_INDIC_TOP_VOWEL
* Mpost[,Mabove] SD_INDIC_RIGHT_VOWEL
* VMpost[,VMabove,SMabove] SD_INDIC_MODIFIER
* SMabove[,SMbelow] SD_INDIC_SIGN (only U+0952 is SMbelow)
* VO SD_INDIC_INDEP_VOWEL
* Mpre SD_INDIC_LEFT_VOWEL
* Halant SD_INDIC_HALANT
* Nukta SD_INDIC_NUKTA
*
* Vsplit SD_INDIC_LEFT_RIGHT_VOWEL - need to split
* None Extension
*
* The following types are not returned by this program:
*
* Cfirst First consonant
* Clast Last consonant
* Cpre Pre-base
* Chbase Cbase that can be in half form.
* Cra The first non-reph-ra.
* CMra The first non-reph-ra if there is post-base matra.
* Creph Repha
* CMreph Repha if there is post-base matra.
* ZWJ Zero-Width Joiner
* ZWNJ Zero-Width Non-Joiner
* Any Anything
*/
SRendClass::RType
SRendClass::get (SS_UCS4 u)
{
if (u >= 0x1100 && u <= 0x115f) return JamoL;
if (u >= 0x1160 && u <= 0x11a2) return JamoV;
if (u >= 0x11a8 && u <= 0x11f9) return JamoT;
switch (u)
{
// Jamo can use these.
case 0x302e:
case 0x302f:
return Mpre;
case 0x0901:
case 0x0902:
case 0x0981:
case 0x0A81:
case 0x0B01:
case 0x0A82:
case 0x0A02:
case 0x0A01:
case 0x0A03: // Not VMPost
return VMabove;
case 0x0A70:
case 0x0A71: // Not VMpost
return SMabove;
case 0x0952:
return SMbelow;
case 0x0C3E:
case 0x0C4A: // Not Mabove
return Mpost;
case 0x0962:
case 0x0963:
case 0x09E2:
case 0x09E3: // Not Mbelow
return VMbelow;
case 0x200D:
return ZWJ;
case 0x200C:
return ZWNJ;
case 0x0946:
case 0x0947:
case 0x0948:
case 0x06C5:
case 0x0AC5:
return Mpost; // Not above.
case 0x0CC3:
return LMpost; // It can be proven that OTF fonts treat this as LMpost.
}
int ct = getCharType (u);
switch (ct)
{
case SD_INDIC_CONSONANT_BASE: return Cbase;
case SD_INDIC_CONSONANT_BELOW_BASE: return Cbelow;
case SD_INDIC_CONSONANT_POST_BASE: return Cpost;
case SD_INDIC_CONSONANT_DEAD: return Cdead;
case SD_INDIC_BOTTOM_VOWEL: return Mbelow;
case SD_INDIC_TOP_VOWEL: return Mabove;
case SD_INDIC_RIGHT_VOWEL: return Mpost;
case SD_INDIC_MODIFIER: return VMpost;
case SD_INDIC_SIGN: return SMabove;
case SD_INDIC_INDEP_VOWEL: return VO;
case SD_INDIC_LEFT_VOWEL: return Mpre;
case SD_INDIC_HALANT: return Halant;
case SD_INDIC_NUKTA: return Nukta;
case SD_INDIC_LEFT_RIGHT_VOWEL: return Vsplit;
}
/* khmm */
return Any;
}
/*!
* \brief Split the vowel into two parts.
* \param u is the input character
* \param left is the left-vowel output character
* \param right is the right-vowel output character
* \return true if the split has been successful.
*/
bool
SRendClass::split (SS_UCS4 u, SS_UCS4* left, SS_UCS4* right)
{
// Unfortunately not everything is LR.
switch (u)
{
case 0x0B48: // LEFT-TOP 4,6
*left = 0x0B47; *right = 0x0B56;
return true;
case 0x0C48: // TOP-BOTTOM 6,7
*left = 0x0C46; *right = 0x0C56;
return true;
case 0x0CC0: // TOP-RIGHT 6,5
*left = 0x0CBF; *right = 0x0CD5;
return true;
case 0x0CC7: // TOP-RIGHT 6,5
*left = 0x0CC6; *right = 0x0CD5;
return true;
case 0x0CC8: // TOP-RIGHT 6,5
*left = 0x0CC6; *right = 0x0CD6;
return true;
case 0x0CCA: // TOP-RIGHT 6,5
*left = 0x0CC6; *right = 0x0CC2;
return true;
case 0x0CCB: // TOP-RIGHT 6,5
*left = 0x0CCA; *right = 0x0CD5;
return true;
case 0x0D4B: // LEFT-RIGHT 4,5 - why did I leave this out?
*left = 0x0D47; *right = 0x0D3E;
return true;
// Tibetan:
case 0x0F43: // Any, Below
*left = 0x0F42; *right = 0x0FB7;
return true;
case 0x0F4D: // Any, Below
*left = 0x0F4C; *right = 0x0FB7;
return true;
case 0x0F52: // Any, Below
*left = 0x0F51; *right = 0x0FB7;
return true;
case 0x0F57: // Any, Below
*left = 0x0F56; *right = 0x0FB7;
return true;
case 0x0F5C: // Any, Below
*left = 0x0F5B; *right = 0x0FB7;
return true;
case 0x0F69: // Any, Below
*left = 0x0F40; *right = 0x0FB5;
return true;
case 0x0F73: // Below, Top
*left = 0x0F71; *right = 0x0F72;
return true;
case 0x0F75: // Below, Below
*left = 0x0F71; *right = 0x0F74;
return true;
case 0x0F76: // Below, Top
*left = 0x0FB2; *right = 0x0F80;
return true;
case 0x0F77: // Below, Further split - usage is discouraged.
*left = 0x0FB2; *right = 0x0F81;
return true;
case 0x0F78: // Below, Top
*left = 0x0FB3; *right = 0x0F80;
return true;
case 0x0F79: // Below, Further split - usage is discouraged.
*left = 0x0FB3; *right = 0x0F81;
return true;
case 0x0F81: // Below, Top
*left = 0x0F71; *right = 0x0F80;
return true;
case 0x0F93: // Below, Below
*left = 0x0F92; *right = 0x0FB7;
return true;
case 0x0F9D: // Below, Below
*left = 0x0F9C; *right = 0x0FB7;
return true;
case 0x0FA2: // Below, Below
*left = 0x0FA1; *right = 0x0FB7;
return true;
case 0x0FA7: // Below, Below
*left = 0x0FA6; *right = 0x0FB7;
return true;
case 0x0FAC: // Below, Below
*left = 0x0FAB; *right = 0x0FB7;
return true;
}
if (get (u) != Vsplit) return false;
*left = getLRVowelLeft (u);
*right = getLRVowelRight (u);
return true;
}
/*!
* \brief Convert type to a string.
* \return a string representing type.
*/
const char*
SRendClass::string (RType type)
{
switch (type)
{
case Cfirst: return "Cfirst";
case Clast: return "Clast";
case Cpre: return "Cpre";
case Cbase: return "Cbase";
case Chbase: return "Chbase";
case Cbelow: return "Cbelow";
case Cpost: return "Cpost";
case Cdead: return "Cdead";
case Cra: return "Cra";
case CMra: return "CMra";
case Mpre: return "Mpre";
case Mabove: return "Mabove";
case Mbelow: return "Mbelow";
case Mpost: return "Mpost";
case VMbelow: return "VMbelow";
case VMabove: return "VMabove";
case VMpost: return "VMpost";
case LMpost: return "LMpost";
case SMabove: return "SMabove";
case SMbelow: return "SMbelow";
case VO: return "VO";
case Nukta: return "Nukta";
case Halant: return "Halant";
case Vsplit: return "Vsplit";
case Creph: return "Creph";
case CMreph: return "CMreph";
case ZWJ: return "ZWJ";
case ZWNJ: return "ZWNJ";
case Any: return "Any";
case JamoL: return "JamoL";
case JamoV: return "JamoV";
case JamoT: return "JamoT";
default: break;
}
return "Unknown";
}
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